/**
 * <copyright> </copyright> $Id$
 */
package org.storydriven.modeling.activities.presentation;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EventObject;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.common.command.BasicCommandStack;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CommandStack;
import org.eclipse.emf.common.command.CommandStackListener;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.ui.MarkerHelper;
import org.eclipse.emf.common.ui.ViewerPane;
import org.eclipse.emf.common.ui.editor.ProblemEditorPart;
import org.eclipse.emf.common.ui.viewer.IViewerProvider;
import org.eclipse.emf.common.util.BasicDiagnostic;
import org.eclipse.emf.common.util.Diagnostic;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EValidator;
import org.eclipse.emf.ecore.provider.EcoreItemProviderAdapterFactory;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.util.EContentAdapter;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.domain.IEditingDomainProvider;
import org.eclipse.emf.edit.provider.AdapterFactoryItemDelegator;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
import org.eclipse.emf.edit.provider.resource.ResourceItemProviderAdapterFactory;
import org.eclipse.emf.edit.ui.action.EditingDomainActionBarContributor;
import org.eclipse.emf.edit.ui.celleditor.AdapterFactoryTreeEditor;
import org.eclipse.emf.edit.ui.dnd.EditingDomainViewerDropAdapter;
import org.eclipse.emf.edit.ui.dnd.LocalTransfer;
import org.eclipse.emf.edit.ui.dnd.ViewerDragAdapter;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.emf.edit.ui.provider.UnwrappingSelectionProvider;
import org.eclipse.emf.edit.ui.util.EditUIMarkerHelper;
import org.eclipse.emf.edit.ui.util.EditUIUtil;
import org.eclipse.emf.edit.ui.view.ExtendedPropertySheetPage;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IStatusLineManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeColumn;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IPartListener;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.WorkspaceModifyOperation;
import org.eclipse.ui.dialogs.SaveAsDialog;
import org.eclipse.ui.ide.IGotoMarker;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.MultiPageEditorPart;
import org.eclipse.ui.views.contentoutline.ContentOutline;
import org.eclipse.ui.views.contentoutline.ContentOutlinePage;
import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
import org.eclipse.ui.views.properties.IPropertySheetPage;
import org.eclipse.ui.views.properties.PropertySheet;
import org.eclipse.ui.views.properties.PropertySheetPage;
import org.storydriven.modeling.activities.expressions.provider.ExpressionsItemProviderAdapterFactory;
import org.storydriven.modeling.activities.provider.ActivitiesItemProviderAdapterFactory;
import org.storydriven.modeling.calls.provider.CallsItemProviderAdapterFactory;
import org.storydriven.modeling.patterns.provider.PatternsItemProviderAdapterFactory;
import org.storydriven.modeling.presentation.SDMEditorPlugin;
import org.storydriven.modeling.provider.SDMItemProviderAdapterFactory;
import org.storydriven.modeling.templates.provider.TemplatesItemProviderAdapterFactory;

/**
 * This is an example of a Activities model editor.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated
 */
public class ActivitiesEditor extends MultiPageEditorPart implements IEditingDomainProvider, ISelectionProvider, IMenuListener,
		IViewerProvider, IGotoMarker
{
	/**
	 * This keeps track of the editing domain that is used to track all changes to the model.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected AdapterFactoryEditingDomain			editingDomain;

	/**
	 * This is the one adapter factory used for providing views of the model.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ComposedAdapterFactory				adapterFactory;

	/**
	 * This is the content outline page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IContentOutlinePage					contentOutlinePage;

	/**
	 * This is a kludge...
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IStatusLineManager					contentOutlineStatusLineManager;

	/**
	 * This is the content outline page's viewer.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected TreeViewer							contentOutlineViewer;

	/**
	 * This is the property sheet page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected PropertySheetPage						propertySheetPage;

	/**
	 * This is the viewer that shadows the selection in the content outline.
	 * The parent relation must be correctly defined for this to work.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected TreeViewer							selectionViewer;

	/**
	 * This inverts the roll of parent and child in the content provider and show parents as a tree.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected TreeViewer							parentViewer;

	/**
	 * This shows how a tree view works.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected TreeViewer							treeViewer;

	/**
	 * This shows how a list view works.
	 * A list viewer doesn't support icons.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ListViewer							listViewer;

	/**
	 * This shows how a table view works.
	 * A table can be used as a list with icons.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected TableViewer							tableViewer;

	/**
	 * This shows how a tree view with columns works.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected TreeViewer							treeViewerWithColumns;

	/**
	 * This keeps track of the active viewer pane, in the book.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ViewerPane							currentViewerPane;

	/**
	 * This keeps track of the active content viewer, which may be either one of the viewers in the pages or the content outline viewer.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Viewer								currentViewer;

	/**
	 * This listens to which ever viewer is active.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ISelectionChangedListener				selectionChangedListener;

	/**
	 * This keeps track of all the {@link org.eclipse.jface.viewers.ISelectionChangedListener}s that are listening to this editor.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Collection<ISelectionChangedListener>	selectionChangedListeners	= new ArrayList<ISelectionChangedListener>();

	/**
	 * This keeps track of the selection of the editor as a whole.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ISelection							editorSelection				= StructuredSelection.EMPTY;

	/**
	 * The MarkerHelper is responsible for creating workspace resource markers presented
	 * in Eclipse's Problems View.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected MarkerHelper							markerHelper				= new EditUIMarkerHelper();

	/**
	 * This listens for when the outline becomes active
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IPartListener							partListener				= new IPartListener()
																				{
																					public void partActivated(IWorkbenchPart p)
																					{
																						if (p instanceof ContentOutline)
																						{
																							if (((ContentOutline) p).getCurrentPage() == contentOutlinePage)
																							{
																								getActionBarContributor().setActiveEditor(
																										ActivitiesEditor.this);

																								setCurrentViewer(contentOutlineViewer);
																							}
																						}
																						else if (p instanceof PropertySheet)
																						{
																							if (((PropertySheet) p).getCurrentPage() == propertySheetPage)
																							{
																								getActionBarContributor().setActiveEditor(
																										ActivitiesEditor.this);
																								handleActivate();
																							}
																						}
																						else if (p == ActivitiesEditor.this)
																						{
																							handleActivate();
																						}
																					}

																					public void partBroughtToTop(IWorkbenchPart p)
																					{
																						// Ignore.
																					}

																					public void partClosed(IWorkbenchPart p)
																					{
																						// Ignore.
																					}

																					public void partDeactivated(IWorkbenchPart p)
																					{
																						// Ignore.
																					}

																					public void partOpened(IWorkbenchPart p)
																					{
																						// Ignore.
																					}
																				};

	/**
	 * Resources that have been removed since last activation.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Collection<Resource>					removedResources			= new ArrayList<Resource>();

	/**
	 * Resources that have been changed since last activation.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Collection<Resource>					changedResources			= new ArrayList<Resource>();

	/**
	 * Resources that have been saved.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Collection<Resource>					savedResources				= new ArrayList<Resource>();

	/**
	 * Map to store the diagnostic associated with a resource.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Map<Resource, Diagnostic>				resourceToDiagnosticMap		= new LinkedHashMap<Resource, Diagnostic>();

	/**
	 * Controls whether the problem indication should be updated.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected boolean								updateProblemIndication		= true;

	/**
	 * Adapter used to update the problem indication when resources are demanded loaded.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected EContentAdapter						problemIndicationAdapter	= new EContentAdapter()
																				{
																					@Override
																					public void notifyChanged(Notification notification)
																					{
																						if (notification.getNotifier() instanceof Resource)
																						{
																							switch (notification
																									.getFeatureID(Resource.class))
																							{
																								case Resource.RESOURCE__IS_LOADED:
																								case Resource.RESOURCE__ERRORS:
																								case Resource.RESOURCE__WARNINGS:
																								{
																									Resource resource = (Resource) notification
																											.getNotifier();
																									Diagnostic diagnostic = analyzeResourceProblems(
																											resource, null);
																									if (diagnostic.getSeverity() != Diagnostic.OK)
																									{
																										resourceToDiagnosticMap.put(
																												resource, diagnostic);
																									}
																									else
																									{
																										resourceToDiagnosticMap
																												.remove(resource);
																									}

																									if (updateProblemIndication)
																									{
																										getSite().getShell().getDisplay()
																												.asyncExec(new Runnable()
																												{
																													public void run()
																													{
																														updateProblemIndication();
																													}
																												});
																									}
																									break;
																								}
																							}
																						}
																						else
																						{
																							super.notifyChanged(notification);
																						}
																					}

																					@Override
																					protected void setTarget(Resource target)
																					{
																						basicSetTarget(target);
																					}

																					@Override
																					protected void unsetTarget(Resource target)
																					{
																						basicUnsetTarget(target);
																					}
																				};

	/**
	 * This listens for workspace changes.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IResourceChangeListener				resourceChangeListener		= new IResourceChangeListener()
																				{
																					public void resourceChanged(IResourceChangeEvent event)
																					{
																						IResourceDelta delta = event.getDelta();
																						try
																						{
																							class ResourceDeltaVisitor implements
																									IResourceDeltaVisitor
																							{
																								protected ResourceSet			resourceSet			= editingDomain
																																							.getResourceSet();
																								protected Collection<Resource>	changedResources	= new ArrayList<Resource>();
																								protected Collection<Resource>	removedResources	= new ArrayList<Resource>();

																								public boolean visit(IResourceDelta delta)
																								{
																									if (delta.getResource().getType() == IResource.FILE)
																									{
																										if (delta.getKind() == IResourceDelta.REMOVED
																												|| delta.getKind() == IResourceDelta.CHANGED
																												&& delta.getFlags() != IResourceDelta.MARKERS)
																										{
																											Resource resource = resourceSet
																													.getResource(
																															URI.createPlatformResourceURI(
																																	delta.getFullPath()
																																			.toString(),
																																	true),
																															false);
																											if (resource != null)
																											{
																												if (delta.getKind() == IResourceDelta.REMOVED)
																												{
																													removedResources
																															.add(resource);
																												}
																												else if (!savedResources
																														.remove(resource))
																												{
																													changedResources
																															.add(resource);
																												}
																											}
																										}
																									}

																									return true;
																								}

																								public Collection<Resource> getChangedResources()
																								{
																									return changedResources;
																								}

																								public Collection<Resource> getRemovedResources()
																								{
																									return removedResources;
																								}
																							}

																							final ResourceDeltaVisitor visitor = new ResourceDeltaVisitor();
																							delta.accept(visitor);

																							if (!visitor.getRemovedResources().isEmpty())
																							{
																								getSite().getShell().getDisplay()
																										.asyncExec(new Runnable()
																										{
																											public void run()
																											{
																												removedResources.addAll(visitor
																														.getRemovedResources());
																												if (!isDirty())
																												{
																													getSite()
																															.getPage()
																															.closeEditor(
																																	ActivitiesEditor.this,
																																	false);
																												}
																											}
																										});
																							}

																							if (!visitor.getChangedResources().isEmpty())
																							{
																								getSite().getShell().getDisplay()
																										.asyncExec(new Runnable()
																										{
																											public void run()
																											{
																												changedResources.addAll(visitor
																														.getChangedResources());
																												if (getSite().getPage()
																														.getActiveEditor() == ActivitiesEditor.this)
																												{
																													handleActivate();
																												}
																											}
																										});
																							}
																						}
																						catch (CoreException exception)
																						{
																							SDMEditorPlugin.INSTANCE.log(exception);
																						}
																					}
																				};

	/**
	 * Handles activation of the editor or it's associated views.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void handleActivate()
	{
		// Recompute the read only state.
		//
		if (editingDomain.getResourceToReadOnlyMap() != null)
		{
			editingDomain.getResourceToReadOnlyMap().clear();

			// Refresh any actions that may become enabled or disabled.
			//
			setSelection(getSelection());
		}

		if (!removedResources.isEmpty())
		{
			if (handleDirtyConflict())
			{
				getSite().getPage().closeEditor(ActivitiesEditor.this, false);
			}
			else
			{
				removedResources.clear();
				changedResources.clear();
				savedResources.clear();
			}
		}
		else if (!changedResources.isEmpty())
		{
			changedResources.removeAll(savedResources);
			handleChangedResources();
			changedResources.clear();
			savedResources.clear();
		}
	}

	/**
	 * Handles what to do with changed resources on activation.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void handleChangedResources()
	{
		if (!changedResources.isEmpty() && (!isDirty() || handleDirtyConflict()))
		{
			if (isDirty())
			{
				changedResources.addAll(editingDomain.getResourceSet().getResources());
			}
			editingDomain.getCommandStack().flush();

			updateProblemIndication = false;
			for (Resource resource : changedResources)
			{
				if (resource.isLoaded())
				{
					resource.unload();
					try
					{
						resource.load(Collections.EMPTY_MAP);
					}
					catch (IOException exception)
					{
						if (!resourceToDiagnosticMap.containsKey(resource))
						{
							resourceToDiagnosticMap.put(resource, analyzeResourceProblems(resource, exception));
						}
					}
				}
			}

			if (AdapterFactoryEditingDomain.isStale(editorSelection))
			{
				setSelection(StructuredSelection.EMPTY);
			}

			updateProblemIndication = true;
			updateProblemIndication();
		}
	}

	/**
	 * Updates the problems indication with the information described in the specified diagnostic.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void updateProblemIndication()
	{
		if (updateProblemIndication)
		{
			BasicDiagnostic diagnostic = new BasicDiagnostic(Diagnostic.OK, "org.storydriven.modeling.editor", 0, null, new Object[]
			{
				editingDomain.getResourceSet()
			});
			for (Diagnostic childDiagnostic : resourceToDiagnosticMap.values())
			{
				if (childDiagnostic.getSeverity() != Diagnostic.OK)
				{
					diagnostic.add(childDiagnostic);
				}
			}

			int lastEditorPage = getPageCount() - 1;
			if (lastEditorPage >= 0 && getEditor(lastEditorPage) instanceof ProblemEditorPart)
			{
				((ProblemEditorPart) getEditor(lastEditorPage)).setDiagnostic(diagnostic);
				if (diagnostic.getSeverity() != Diagnostic.OK)
				{
					setActivePage(lastEditorPage);
				}
			}
			else if (diagnostic.getSeverity() != Diagnostic.OK)
			{
				ProblemEditorPart problemEditorPart = new ProblemEditorPart();
				problemEditorPart.setDiagnostic(diagnostic);
				problemEditorPart.setMarkerHelper(markerHelper);
				try
				{
					addPage(++lastEditorPage, problemEditorPart, getEditorInput());
					setPageText(lastEditorPage, problemEditorPart.getPartName());
					setActivePage(lastEditorPage);
					showTabs();
				}
				catch (PartInitException exception)
				{
					SDMEditorPlugin.INSTANCE.log(exception);
				}
			}

			if (markerHelper.hasMarkers(editingDomain.getResourceSet()))
			{
				markerHelper.deleteMarkers(editingDomain.getResourceSet());
				if (diagnostic.getSeverity() != Diagnostic.OK)
				{
					try
					{
						markerHelper.createMarkers(diagnostic);
					}
					catch (CoreException exception)
					{
						SDMEditorPlugin.INSTANCE.log(exception);
					}
				}
			}
		}
	}

	/**
	 * Shows a dialog that asks if conflicting changes should be discarded.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected boolean handleDirtyConflict()
	{
		return MessageDialog.openQuestion(getSite().getShell(), getString("_UI_FileConflict_label"), getString("_WARN_FileConflict"));
	}

	/**
	 * This creates a model editor.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public ActivitiesEditor()
	{
		super();
		initializeEditingDomain();
	}

	/**
	 * This sets up the editing domain for the model editor.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void initializeEditingDomain()
	{
		// Create an adapter factory that yields item providers.
		//
		adapterFactory = new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE);

		adapterFactory.addAdapterFactory(new ResourceItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new SDMItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new ActivitiesItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new ExpressionsItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new org.storydriven.modeling.expressions.provider.ExpressionsItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new CallsItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new org.storydriven.modeling.calls.expressions.provider.ExpressionsItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new PatternsItemProviderAdapterFactory());
		adapterFactory
				.addAdapterFactory(new org.storydriven.modeling.patterns.expressions.provider.ExpressionsItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new TemplatesItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new EcoreItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new ReflectiveItemProviderAdapterFactory());

		// Create the command stack that will notify this editor as commands are executed.
		//
		BasicCommandStack commandStack = new BasicCommandStack();

		// Add a listener to set the most recent command's affected objects to be the selection of the viewer with focus.
		//
		commandStack.addCommandStackListener(new CommandStackListener()
		{
			public void commandStackChanged(final EventObject event)
			{
				getContainer().getDisplay().asyncExec(new Runnable()
				{
					public void run()
					{
						firePropertyChange(IEditorPart.PROP_DIRTY);

						// Try to select the affected objects.
						//
						Command mostRecentCommand = ((CommandStack) event.getSource()).getMostRecentCommand();
						if (mostRecentCommand != null)
						{
							setSelectionToViewer(mostRecentCommand.getAffectedObjects());
						}
						if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed())
						{
							propertySheetPage.refresh();
						}
					}
				});
			}
		});

		// Create the editing domain with a special command stack.
		//
		editingDomain = new AdapterFactoryEditingDomain(adapterFactory, commandStack, new HashMap<Resource, Boolean>());
	}

	/**
	 * This is here for the listener to be able to call it.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected void firePropertyChange(int action)
	{
		super.firePropertyChange(action);
	}

	/**
	 * This sets the selection into whichever viewer is active.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setSelectionToViewer(Collection<?> collection)
	{
		final Collection<?> theSelection = collection;
		// Make sure it's okay.
		//
		if (theSelection != null && !theSelection.isEmpty())
		{
			Runnable runnable = new Runnable()
			{
				public void run()
				{
					// Try to select the items in the current content viewer of the editor.
					//
					if (currentViewer != null)
					{
						currentViewer.setSelection(new StructuredSelection(theSelection.toArray()), true);
					}
				}
			};
			getSite().getShell().getDisplay().asyncExec(runnable);
		}
	}

	/**
	 * This returns the editing domain as required by the {@link IEditingDomainProvider} interface.
	 * This is important for implementing the static methods of {@link AdapterFactoryEditingDomain}
	 * and for supporting {@link org.eclipse.emf.edit.ui.action.CommandAction}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EditingDomain getEditingDomain()
	{
		return editingDomain;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public class ReverseAdapterFactoryContentProvider extends AdapterFactoryContentProvider
	{
		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public ReverseAdapterFactoryContentProvider(AdapterFactory adapterFactory)
		{
			super(adapterFactory);
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		public Object[] getElements(Object object)
		{
			Object parent = super.getParent(object);
			return (parent == null ? Collections.EMPTY_SET : Collections.singleton(parent)).toArray();
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		public Object[] getChildren(Object object)
		{
			Object parent = super.getParent(object);
			return (parent == null ? Collections.EMPTY_SET : Collections.singleton(parent)).toArray();
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		public boolean hasChildren(Object object)
		{
			Object parent = super.getParent(object);
			return parent != null;
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		public Object getParent(Object object)
		{
			return null;
		}
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setCurrentViewerPane(ViewerPane viewerPane)
	{
		if (currentViewerPane != viewerPane)
		{
			if (currentViewerPane != null)
			{
				currentViewerPane.showFocus(false);
			}
			currentViewerPane = viewerPane;
		}
		setCurrentViewer(currentViewerPane.getViewer());
	}

	/**
	 * This makes sure that one content viewer, either for the current page or the outline view, if it has focus,
	 * is the current one.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setCurrentViewer(Viewer viewer)
	{
		// If it is changing...
		//
		if (currentViewer != viewer)
		{
			if (selectionChangedListener == null)
			{
				// Create the listener on demand.
				//
				selectionChangedListener = new ISelectionChangedListener()
				{
					// This just notifies those things that are affected by the section.
					//
					public void selectionChanged(SelectionChangedEvent selectionChangedEvent)
					{
						setSelection(selectionChangedEvent.getSelection());
					}
				};
			}

			// Stop listening to the old one.
			//
			if (currentViewer != null)
			{
				currentViewer.removeSelectionChangedListener(selectionChangedListener);
			}

			// Start listening to the new one.
			//
			if (viewer != null)
			{
				viewer.addSelectionChangedListener(selectionChangedListener);
			}

			// Remember it.
			//
			currentViewer = viewer;

			// Set the editors selection based on the current viewer's selection.
			//
			setSelection(currentViewer == null ? StructuredSelection.EMPTY : currentViewer.getSelection());
		}
	}

	/**
	 * This returns the viewer as required by the {@link IViewerProvider} interface.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Viewer getViewer()
	{
		return currentViewer;
	}

	/**
	 * This creates a context menu for the viewer and adds a listener as well registering the menu for extension.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void createContextMenuFor(StructuredViewer viewer)
	{
		MenuManager contextMenu = new MenuManager("#PopUp");
		contextMenu.add(new Separator("additions"));
		contextMenu.setRemoveAllWhenShown(true);
		contextMenu.addMenuListener(this);
		Menu menu = contextMenu.createContextMenu(viewer.getControl());
		viewer.getControl().setMenu(menu);
		getSite().registerContextMenu(contextMenu, new UnwrappingSelectionProvider(viewer));

		int dndOperations = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK;
		Transfer[] transfers = new Transfer[]
		{
			LocalTransfer.getInstance()
		};
		viewer.addDragSupport(dndOperations, transfers, new ViewerDragAdapter(viewer));
		viewer.addDropSupport(dndOperations, transfers, new EditingDomainViewerDropAdapter(editingDomain, viewer));
	}

	/**
	 * This is the method called to load a resource into the editing domain's resource set based on the editor's input.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void createModel()
	{
		URI resourceURI = EditUIUtil.getURI(getEditorInput());
		Exception exception = null;
		Resource resource = null;
		try
		{
			// Load the resource through the editing domain.
			//
			resource = editingDomain.getResourceSet().getResource(resourceURI, true);
		}
		catch (Exception e)
		{
			exception = e;
			resource = editingDomain.getResourceSet().getResource(resourceURI, false);
		}

		Diagnostic diagnostic = analyzeResourceProblems(resource, exception);
		if (diagnostic.getSeverity() != Diagnostic.OK)
		{
			resourceToDiagnosticMap.put(resource, analyzeResourceProblems(resource, exception));
		}
		editingDomain.getResourceSet().eAdapters().add(problemIndicationAdapter);
	}

	/**
	 * Returns a diagnostic describing the errors and warnings listed in the resource
	 * and the specified exception (if any).
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Diagnostic analyzeResourceProblems(Resource resource, Exception exception)
	{
		if (!resource.getErrors().isEmpty() || !resource.getWarnings().isEmpty())
		{
			BasicDiagnostic basicDiagnostic = new BasicDiagnostic(Diagnostic.ERROR, "org.storydriven.modeling.editor", 0, getString(
					"_UI_CreateModelError_message", resource.getURI()), new Object[]
			{
				exception == null ? (Object) resource : exception
			});
			basicDiagnostic.merge(EcoreUtil.computeDiagnostic(resource, true));
			return basicDiagnostic;
		}
		else if (exception != null)
		{
			return new BasicDiagnostic(Diagnostic.ERROR, "org.storydriven.modeling.editor", 0, getString("_UI_CreateModelError_message",
					resource.getURI()), new Object[]
			{
				exception
			});
		}
		else
		{
			return Diagnostic.OK_INSTANCE;
		}
	}

	/**
	 * This is the method used by the framework to install your own controls.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void createPages()
	{
		// Creates the model from the editor input
		//
		createModel();

		// Only creates the other pages if there is something that can be edited
		//
		if (!getEditingDomain().getResourceSet().getResources().isEmpty())
		{
			// Create a page for the selection tree view.
			//
			{
				ViewerPane viewerPane = new ViewerPane(getSite().getPage(), ActivitiesEditor.this)
				{
					@Override
					public Viewer createViewer(Composite composite)
					{
						Tree tree = new Tree(composite, SWT.MULTI);
						TreeViewer newTreeViewer = new TreeViewer(tree);
						return newTreeViewer;
					}

					@Override
					public void requestActivation()
					{
						super.requestActivation();
						setCurrentViewerPane(this);
					}
				};
				viewerPane.createControl(getContainer());

				selectionViewer = (TreeViewer) viewerPane.getViewer();
				selectionViewer.setContentProvider(new AdapterFactoryContentProvider(adapterFactory));

				selectionViewer.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));
				selectionViewer.setInput(editingDomain.getResourceSet());
				selectionViewer.setSelection(new StructuredSelection(editingDomain.getResourceSet().getResources().get(0)), true);
				viewerPane.setTitle(editingDomain.getResourceSet());

				new AdapterFactoryTreeEditor(selectionViewer.getTree(), adapterFactory);

				createContextMenuFor(selectionViewer);
				int pageIndex = addPage(viewerPane.getControl());
				setPageText(pageIndex, getString("_UI_SelectionPage_label"));
			}

			// Create a page for the parent tree view.
			//
			{
				ViewerPane viewerPane = new ViewerPane(getSite().getPage(), ActivitiesEditor.this)
				{
					@Override
					public Viewer createViewer(Composite composite)
					{
						Tree tree = new Tree(composite, SWT.MULTI);
						TreeViewer newTreeViewer = new TreeViewer(tree);
						return newTreeViewer;
					}

					@Override
					public void requestActivation()
					{
						super.requestActivation();
						setCurrentViewerPane(this);
					}
				};
				viewerPane.createControl(getContainer());

				parentViewer = (TreeViewer) viewerPane.getViewer();
				parentViewer.setAutoExpandLevel(30);
				parentViewer.setContentProvider(new ReverseAdapterFactoryContentProvider(adapterFactory));
				parentViewer.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));

				createContextMenuFor(parentViewer);
				int pageIndex = addPage(viewerPane.getControl());
				setPageText(pageIndex, getString("_UI_ParentPage_label"));
			}

			// This is the page for the list viewer
			//
			{
				ViewerPane viewerPane = new ViewerPane(getSite().getPage(), ActivitiesEditor.this)
				{
					@Override
					public Viewer createViewer(Composite composite)
					{
						return new ListViewer(composite);
					}

					@Override
					public void requestActivation()
					{
						super.requestActivation();
						setCurrentViewerPane(this);
					}
				};
				viewerPane.createControl(getContainer());
				listViewer = (ListViewer) viewerPane.getViewer();
				listViewer.setContentProvider(new AdapterFactoryContentProvider(adapterFactory));
				listViewer.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));

				createContextMenuFor(listViewer);
				int pageIndex = addPage(viewerPane.getControl());
				setPageText(pageIndex, getString("_UI_ListPage_label"));
			}

			// This is the page for the tree viewer
			//
			{
				ViewerPane viewerPane = new ViewerPane(getSite().getPage(), ActivitiesEditor.this)
				{
					@Override
					public Viewer createViewer(Composite composite)
					{
						return new TreeViewer(composite);
					}

					@Override
					public void requestActivation()
					{
						super.requestActivation();
						setCurrentViewerPane(this);
					}
				};
				viewerPane.createControl(getContainer());
				treeViewer = (TreeViewer) viewerPane.getViewer();
				treeViewer.setContentProvider(new AdapterFactoryContentProvider(adapterFactory));
				treeViewer.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));

				new AdapterFactoryTreeEditor(treeViewer.getTree(), adapterFactory);

				createContextMenuFor(treeViewer);
				int pageIndex = addPage(viewerPane.getControl());
				setPageText(pageIndex, getString("_UI_TreePage_label"));
			}

			// This is the page for the table viewer.
			//
			{
				ViewerPane viewerPane = new ViewerPane(getSite().getPage(), ActivitiesEditor.this)
				{
					@Override
					public Viewer createViewer(Composite composite)
					{
						return new TableViewer(composite);
					}

					@Override
					public void requestActivation()
					{
						super.requestActivation();
						setCurrentViewerPane(this);
					}
				};
				viewerPane.createControl(getContainer());
				tableViewer = (TableViewer) viewerPane.getViewer();

				Table table = tableViewer.getTable();
				TableLayout layout = new TableLayout();
				table.setLayout(layout);
				table.setHeaderVisible(true);
				table.setLinesVisible(true);

				TableColumn objectColumn = new TableColumn(table, SWT.NONE);
				layout.addColumnData(new ColumnWeightData(3, 100, true));
				objectColumn.setText(getString("_UI_ObjectColumn_label"));
				objectColumn.setResizable(true);

				TableColumn selfColumn = new TableColumn(table, SWT.NONE);
				layout.addColumnData(new ColumnWeightData(2, 100, true));
				selfColumn.setText(getString("_UI_SelfColumn_label"));
				selfColumn.setResizable(true);

				tableViewer.setColumnProperties(new String[]
				{
						"a", "b"
				});
				tableViewer.setContentProvider(new AdapterFactoryContentProvider(adapterFactory));
				tableViewer.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));

				createContextMenuFor(tableViewer);
				int pageIndex = addPage(viewerPane.getControl());
				setPageText(pageIndex, getString("_UI_TablePage_label"));
			}

			// This is the page for the table tree viewer.
			//
			{
				ViewerPane viewerPane = new ViewerPane(getSite().getPage(), ActivitiesEditor.this)
				{
					@Override
					public Viewer createViewer(Composite composite)
					{
						return new TreeViewer(composite);
					}

					@Override
					public void requestActivation()
					{
						super.requestActivation();
						setCurrentViewerPane(this);
					}
				};
				viewerPane.createControl(getContainer());

				treeViewerWithColumns = (TreeViewer) viewerPane.getViewer();

				Tree tree = treeViewerWithColumns.getTree();
				tree.setLayoutData(new FillLayout());
				tree.setHeaderVisible(true);
				tree.setLinesVisible(true);

				TreeColumn objectColumn = new TreeColumn(tree, SWT.NONE);
				objectColumn.setText(getString("_UI_ObjectColumn_label"));
				objectColumn.setResizable(true);
				objectColumn.setWidth(250);

				TreeColumn selfColumn = new TreeColumn(tree, SWT.NONE);
				selfColumn.setText(getString("_UI_SelfColumn_label"));
				selfColumn.setResizable(true);
				selfColumn.setWidth(200);

				treeViewerWithColumns.setColumnProperties(new String[]
				{
						"a", "b"
				});
				treeViewerWithColumns.setContentProvider(new AdapterFactoryContentProvider(adapterFactory));
				treeViewerWithColumns.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));

				createContextMenuFor(treeViewerWithColumns);
				int pageIndex = addPage(viewerPane.getControl());
				setPageText(pageIndex, getString("_UI_TreeWithColumnsPage_label"));
			}

			getSite().getShell().getDisplay().asyncExec(new Runnable()
			{
				public void run()
				{
					setActivePage(0);
				}
			});
		}

		// Ensures that this editor will only display the page's tab
		// area if there are more than one page
		//
		getContainer().addControlListener(new ControlAdapter()
		{
			boolean	guard	= false;

			@Override
			public void controlResized(ControlEvent event)
			{
				if (!guard)
				{
					guard = true;
					hideTabs();
					guard = false;
				}
			}
		});

		getSite().getShell().getDisplay().asyncExec(new Runnable()
		{
			public void run()
			{
				updateProblemIndication();
			}
		});
	}

	/**
	 * If there is just one page in the multi-page editor part,
	 * this hides the single tab at the bottom.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void hideTabs()
	{
		if (getPageCount() <= 1)
		{
			setPageText(0, "");
			if (getContainer() instanceof CTabFolder)
			{
				((CTabFolder) getContainer()).setTabHeight(1);
				Point point = getContainer().getSize();
				getContainer().setSize(point.x, point.y + 6);
			}
		}
	}

	/**
	 * If there is more than one page in the multi-page editor part,
	 * this shows the tabs at the bottom.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void showTabs()
	{
		if (getPageCount() > 1)
		{
			setPageText(0, getString("_UI_SelectionPage_label"));
			if (getContainer() instanceof CTabFolder)
			{
				((CTabFolder) getContainer()).setTabHeight(SWT.DEFAULT);
				Point point = getContainer().getSize();
				getContainer().setSize(point.x, point.y - 6);
			}
		}
	}

	/**
	 * This is used to track the active viewer.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected void pageChange(int pageIndex)
	{
		super.pageChange(pageIndex);

		if (contentOutlinePage != null)
		{
			handleContentOutlineSelection(contentOutlinePage.getSelection());
		}
	}

	/**
	 * This is how the framework determines which interfaces we implement.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@SuppressWarnings("rawtypes")
	@Override
	public Object getAdapter(Class key)
	{
		if (key.equals(IContentOutlinePage.class))
		{
			return showOutlineView() ? getContentOutlinePage() : null;
		}
		else if (key.equals(IPropertySheetPage.class))
		{
			return getPropertySheetPage();
		}
		else if (key.equals(IGotoMarker.class))
		{
			return this;
		}
		else
		{
			return super.getAdapter(key);
		}
	}

	/**
	 * This accesses a cached version of the content outliner.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public IContentOutlinePage getContentOutlinePage()
	{
		if (contentOutlinePage == null)
		{
			// The content outline is just a tree.
			//
			class MyContentOutlinePage extends ContentOutlinePage
			{
				@Override
				public void createControl(Composite parent)
				{
					super.createControl(parent);
					contentOutlineViewer = getTreeViewer();
					contentOutlineViewer.addSelectionChangedListener(this);

					// Set up the tree viewer.
					//
					contentOutlineViewer.setContentProvider(new AdapterFactoryContentProvider(adapterFactory));
					contentOutlineViewer.setLabelProvider(new AdapterFactoryLabelProvider(adapterFactory));
					contentOutlineViewer.setInput(editingDomain.getResourceSet());

					// Make sure our popups work.
					//
					createContextMenuFor(contentOutlineViewer);

					if (!editingDomain.getResourceSet().getResources().isEmpty())
					{
						// Select the root object in the view.
						//
						contentOutlineViewer.setSelection(new StructuredSelection(editingDomain.getResourceSet().getResources().get(0)),
								true);
					}
				}

				@Override
				public void makeContributions(IMenuManager menuManager, IToolBarManager toolBarManager, IStatusLineManager statusLineManager)
				{
					super.makeContributions(menuManager, toolBarManager, statusLineManager);
					contentOutlineStatusLineManager = statusLineManager;
				}

				@Override
				public void setActionBars(IActionBars actionBars)
				{
					super.setActionBars(actionBars);
					getActionBarContributor().shareGlobalActions(this, actionBars);
				}
			}

			contentOutlinePage = new MyContentOutlinePage();

			// Listen to selection so that we can handle it is a special way.
			//
			contentOutlinePage.addSelectionChangedListener(new ISelectionChangedListener()
			{
				// This ensures that we handle selections correctly.
				//
				public void selectionChanged(SelectionChangedEvent event)
				{
					handleContentOutlineSelection(event.getSelection());
				}
			});
		}

		return contentOutlinePage;
	}

	/**
	 * This accesses a cached version of the property sheet.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public IPropertySheetPage getPropertySheetPage()
	{
		if (propertySheetPage == null)
		{
			propertySheetPage = new ExtendedPropertySheetPage(editingDomain)
			{
				@Override
				public void setSelectionToViewer(List<?> selection)
				{
					ActivitiesEditor.this.setSelectionToViewer(selection);
					ActivitiesEditor.this.setFocus();
				}

				@Override
				public void setActionBars(IActionBars actionBars)
				{
					super.setActionBars(actionBars);
					getActionBarContributor().shareGlobalActions(this, actionBars);
				}
			};
			propertySheetPage.setPropertySourceProvider(new AdapterFactoryContentProvider(adapterFactory));
		}

		return propertySheetPage;
	}

	/**
	 * This deals with how we want selection in the outliner to affect the other views.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void handleContentOutlineSelection(ISelection selection)
	{
		if (currentViewerPane != null && !selection.isEmpty() && selection instanceof IStructuredSelection)
		{
			Iterator<?> selectedElements = ((IStructuredSelection) selection).iterator();
			if (selectedElements.hasNext())
			{
				// Get the first selected element.
				//
				Object selectedElement = selectedElements.next();

				// If it's the selection viewer, then we want it to select the same selection as this selection.
				//
				if (currentViewerPane.getViewer() == selectionViewer)
				{
					ArrayList<Object> selectionList = new ArrayList<Object>();
					selectionList.add(selectedElement);
					while (selectedElements.hasNext())
					{
						selectionList.add(selectedElements.next());
					}

					// Set the selection to the widget.
					//
					selectionViewer.setSelection(new StructuredSelection(selectionList));
				}
				else
				{
					// Set the input to the widget.
					//
					if (currentViewerPane.getViewer().getInput() != selectedElement)
					{
						currentViewerPane.getViewer().setInput(selectedElement);
						currentViewerPane.setTitle(selectedElement);
					}
				}
			}
		}
	}

	/**
	 * This is for implementing {@link IEditorPart} and simply tests the command stack.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public boolean isDirty()
	{
		return ((BasicCommandStack) editingDomain.getCommandStack()).isSaveNeeded();
	}

	/**
	 * This is for implementing {@link IEditorPart} and simply saves the model file.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void doSave(IProgressMonitor progressMonitor)
	{
		// Save only resources that have actually changed.
		//
		final Map<Object, Object> saveOptions = new HashMap<Object, Object>();
		saveOptions.put(Resource.OPTION_SAVE_ONLY_IF_CHANGED, Resource.OPTION_SAVE_ONLY_IF_CHANGED_MEMORY_BUFFER);

		// Do the work within an operation because this is a long running activity that modifies the workbench.
		//
		WorkspaceModifyOperation operation = new WorkspaceModifyOperation()
		{
			// This is the method that gets invoked when the operation runs.
			//
			@Override
			public void execute(IProgressMonitor monitor)
			{
				// Save the resources to the file system.
				//
				boolean first = true;
				for (Resource resource : editingDomain.getResourceSet().getResources())
				{
					if ((first || !resource.getContents().isEmpty() || isPersisted(resource)) && !editingDomain.isReadOnly(resource))
					{
						try
						{
							long timeStamp = resource.getTimeStamp();
							resource.save(saveOptions);
							if (resource.getTimeStamp() != timeStamp)
							{
								savedResources.add(resource);
							}
						}
						catch (Exception exception)
						{
							resourceToDiagnosticMap.put(resource, analyzeResourceProblems(resource, exception));
						}
						first = false;
					}
				}
			}
		};

		updateProblemIndication = false;
		try
		{
			// This runs the options, and shows progress.
			//
			new ProgressMonitorDialog(getSite().getShell()).run(true, false, operation);

			// Refresh the necessary state.
			//
			((BasicCommandStack) editingDomain.getCommandStack()).saveIsDone();
			firePropertyChange(IEditorPart.PROP_DIRTY);
		}
		catch (Exception exception)
		{
			// Something went wrong that shouldn't.
			//
			SDMEditorPlugin.INSTANCE.log(exception);
		}
		updateProblemIndication = true;
		updateProblemIndication();
	}

	/**
	 * This returns whether something has been persisted to the URI of the specified resource.
	 * The implementation uses the URI converter from the editor's resource set to try to open an input stream. 
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected boolean isPersisted(Resource resource)
	{
		boolean result = false;
		try
		{
			InputStream stream = editingDomain.getResourceSet().getURIConverter().createInputStream(resource.getURI());
			if (stream != null)
			{
				result = true;
				stream.close();
			}
		}
		catch (IOException e)
		{
			// Ignore
		}
		return result;
	}

	/**
	 * This always returns true because it is not currently supported.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public boolean isSaveAsAllowed()
	{
		return true;
	}

	/**
	 * This also changes the editor's input.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void doSaveAs()
	{
		SaveAsDialog saveAsDialog = new SaveAsDialog(getSite().getShell());
		saveAsDialog.open();
		IPath path = saveAsDialog.getResult();
		if (path != null)
		{
			IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
			if (file != null)
			{
				doSaveAs(URI.createPlatformResourceURI(file.getFullPath().toString(), true), new FileEditorInput(file));
			}
		}
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void doSaveAs(URI uri, IEditorInput editorInput)
	{
		(editingDomain.getResourceSet().getResources().get(0)).setURI(uri);
		setInputWithNotify(editorInput);
		setPartName(editorInput.getName());
		IProgressMonitor progressMonitor = getActionBars().getStatusLineManager() != null ? getActionBars().getStatusLineManager()
				.getProgressMonitor() : new NullProgressMonitor();
		doSave(progressMonitor);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void gotoMarker(IMarker marker)
	{
		try
		{
			if (marker.getType().equals(EValidator.MARKER))
			{
				String uriAttribute = marker.getAttribute(EValidator.URI_ATTRIBUTE, null);
				if (uriAttribute != null)
				{
					URI uri = URI.createURI(uriAttribute);
					EObject eObject = editingDomain.getResourceSet().getEObject(uri, true);
					if (eObject != null)
					{
						setSelectionToViewer(Collections.singleton(editingDomain.getWrapper(eObject)));
					}
				}
			}
		}
		catch (CoreException exception)
		{
			SDMEditorPlugin.INSTANCE.log(exception);
		}
	}

	/**
	 * This is called during startup.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void init(IEditorSite site, IEditorInput editorInput)
	{
		setSite(site);
		setInputWithNotify(editorInput);
		setPartName(editorInput.getName());
		site.setSelectionProvider(this);
		site.getPage().addPartListener(partListener);
		ResourcesPlugin.getWorkspace().addResourceChangeListener(resourceChangeListener, IResourceChangeEvent.POST_CHANGE);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void setFocus()
	{
		if (currentViewerPane != null)
		{
			currentViewerPane.setFocus();
		}
		else
		{
			getControl(getActivePage()).setFocus();
		}
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void addSelectionChangedListener(ISelectionChangedListener listener)
	{
		selectionChangedListeners.add(listener);
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void removeSelectionChangedListener(ISelectionChangedListener listener)
	{
		selectionChangedListeners.remove(listener);
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider} to return this editor's overall selection.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public ISelection getSelection()
	{
		return editorSelection;
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider} to set this editor's overall selection.
	 * Calling this result will notify the listeners.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setSelection(ISelection selection)
	{
		editorSelection = selection;

		for (ISelectionChangedListener listener : selectionChangedListeners)
		{
			listener.selectionChanged(new SelectionChangedEvent(this, selection));
		}
		setStatusLineManager(selection);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setStatusLineManager(ISelection selection)
	{
		IStatusLineManager statusLineManager = currentViewer != null && currentViewer == contentOutlineViewer ? contentOutlineStatusLineManager
				: getActionBars().getStatusLineManager();

		if (statusLineManager != null)
		{
			if (selection instanceof IStructuredSelection)
			{
				Collection<?> collection = ((IStructuredSelection) selection).toList();
				switch (collection.size())
				{
					case 0:
					{
						statusLineManager.setMessage(getString("_UI_NoObjectSelected"));
						break;
					}
					case 1:
					{
						String text = new AdapterFactoryItemDelegator(adapterFactory).getText(collection.iterator().next());
						statusLineManager.setMessage(getString("_UI_SingleObjectSelected", text));
						break;
					}
					default:
					{
						statusLineManager.setMessage(getString("_UI_MultiObjectSelected", Integer.toString(collection.size())));
						break;
					}
				}
			}
			else
			{
				statusLineManager.setMessage("");
			}
		}
	}

	/**
	 * This looks up a string in the plugin's plugin.properties file.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	private static String getString(String key)
	{
		return SDMEditorPlugin.INSTANCE.getString(key);
	}

	/**
	 * This looks up a string in plugin.properties, making a substitution.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	private static String getString(String key, Object s1)
	{
		return SDMEditorPlugin.INSTANCE.getString(key, new Object[]
		{
			s1
		});
	}

	/**
	 * This implements {@link org.eclipse.jface.action.IMenuListener} to help fill the context menus with contributions from the Edit menu.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void menuAboutToShow(IMenuManager menuManager)
	{
		((IMenuListener) getEditorSite().getActionBarContributor()).menuAboutToShow(menuManager);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EditingDomainActionBarContributor getActionBarContributor()
	{
		return (EditingDomainActionBarContributor) getEditorSite().getActionBarContributor();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public IActionBars getActionBars()
	{
		return getActionBarContributor().getActionBars();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public AdapterFactory getAdapterFactory()
	{
		return adapterFactory;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void dispose()
	{
		updateProblemIndication = false;

		ResourcesPlugin.getWorkspace().removeResourceChangeListener(resourceChangeListener);

		getSite().getPage().removePartListener(partListener);

		adapterFactory.dispose();

		if (getActionBarContributor().getActiveEditor() == this)
		{
			getActionBarContributor().setActiveEditor(null);
		}

		if (propertySheetPage != null)
		{
			propertySheetPage.dispose();
		}

		if (contentOutlinePage != null)
		{
			contentOutlinePage.dispose();
		}

		super.dispose();
	}

	/**
	 * Returns whether the outline view should be presented to the user.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected boolean showOutlineView()
	{
		return true;
	}
}
